Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 27

Waxing Gibbous 86%

17:02

04:19

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 OK
14 OK
15 OK
16 OK
17 Good
18 Good
19 Good
20 Good

Sun - Rise: 05:31, Set: 20:23, Transit: 12:57. Moon - Rise: 17:02, Set: 04:19. Civil Dark: 21:00 - 04:52. Nautical Dark: 21:51 - 04:00. Astro Dark: 22:55 - 02:55

Total Clouds (% Sky Obscured)

66
58
60
65
100
100
100
100
94
100
74
84
84
77
61
46
39
38
36
32
3
0
0
0

Low Clouds (% Sky Obscured)

66
58
60
65
100
95
100
100
84
100
63
73
83
76
61
46
39
38
36
32
3
0
0
0

Medium Clouds (% Sky Obscured)

8
3
13
34
96
25
19
28
83
63
8
9
4
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
2
2
1
0
2
0
0
3
3
0
0
0
0
0
0
0
0
0
3
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

1
0
0
4
15
9
29
19
17
16
14
6
12
3
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
12
11
9
10
10
11
11
13
13
14
15
15
16
17
18
18
18
18
19
18
17
16
15

Chance of Frost

Temperature (°C)

10
9
8
8
8
9
8
9
9
8
8
8
9
9
10
11
12
12
12
11
11
11
9
8

Feels Like (°C)

7
7
6
5
5
5
4
5
4
4
4
3
4
4
5
7
7
8
7
7
7
7
6
4

Dew Point (°C)

8
8
8
8
7
7
6
7
7
7
6
6
7
7
6
5
5
5
5
5
5
6
5
4

Relative Humidity (%)

90
95
96
98
88
88
87
87
87
90
88
87
87
84
73
66
64
63
65
64
66
72
74
74

Pressure (mb)

1025
1025
1025
1025
1025
1025
1026
1026
1026
1026
1027
1027
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028

Ozone (du)

440
445
445
444
445
447
443
436
427
422
415
407
404
402
398
395
394
391
389
388
386
385
384
384

Tuesday 28

Waxing Gibbous 92%

18:18

04:28

21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 Good
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good

Sun - Rise: 05:29, Set: 20:25, Transit: 12:57. Moon - Rise: 18:18, Set: 04:28. Civil Dark: 21:02 - 04:50. Nautical Dark: 21:54 - 03:58. Astro Dark: 22:59 - 02:51

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
0
1
1
1
2
2
2
0
1
1
0
0
0
1
1

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
0
1
1
1
2
2
2
0
1
1
0
0
0
1
1

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

14
14
14
14
14
14
14
15
14
14
15
17
18
20
20
20
21
21
21
21
20
18
18
17

Chance of Frost

Temperature (°C)

8
7
7
7
7
8
8
8
8
8
9
10
11
12
12
12
13
12
12
12
12
11
10
9

Feels Like (°C)

4
3
3
3
3
4
4
4
4
4
6
7
7
6
7
7
8
7
7
6
7
7
6
6

Dew Point (°C)

4
4
4
4
4
5
5
5
5
6
6
7
6
6
6
5
5
5
6
6
6
6
6
6

Relative Humidity (%)

75
78
78
78
78
81
81
82
84
84
82
78
72
67
65
63
61
62
64
66
67
72
77
77

Pressure (mb)

1029
1029
1029
1029
1029
1028
1028
1028
1028
1029
1029
1029
1029
1029
1030
1029
1029
1029
1029
1029
1029
1028
1028
1028

Ozone (du)

385
387
390
392
394
395
395
394
394
393
392
389
388
387
385
383
381
381
381
380
379
379
379
379

Wednesday 29

Waxing Gibbous 97%

19:34

04:38

21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 OK
04 Good
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 Good
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good

Sun - Rise: 05:27, Set: 20:26, Transit: 12:57. Moon - Rise: 19:34, Set: 04:38. Civil Dark: 21:04 - 04:47. Nautical Dark: 21:56 - 03:55. Astro Dark: 23:03 - 02:47

Total Clouds (% Sky Obscured)

1
1
1
1
5
10
14
6
9
3
2
2
3
2
2
1
2
2
2
2
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
1
1
1
5
10
14
6
9
3
2
2
3
2
2
1
2
2
2
2
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

17
17
16
15
14
14
14
13
13
12
12
14
15
15
16
16
17
17
17
17
16
15
12
9

Chance of Frost

Temperature (°C)

9
9
9
9
9
9
9
9
9
9
9
11
12
13
14
15
16
16
16
16
15
15
13
12

Feels Like (°C)

5
5
6
6
6
5
5
5
5
5
6
7
8
9
10
11
12
12
12
11
12
12
11
10

Dew Point (°C)

6
6
6
6
7
7
7
6
5
5
5
6
5
5
5
5
5
5
5
5
6
6
6
6

Relative Humidity (%)

78
78
80
81
84
85
84
81
78
78
74
72
64
59
53
49
47
47
48
48
53
57
61
70

Pressure (mb)

1028
1028
1028
1028
1028
1027
1027
1027
1026
1026
1026
1027
1026
1026
1026
1025
1025
1024
1023
1023
1022
1022
1022
1022

Ozone (du)

377
376
376
376
377
377
377
377
377
377
377
377
378
379
380
381
382
382
381
380
380
381
381
380

Thursday 30

Waxing Gibbous 99%

20:51

04:50

21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 Good
09 OK
10 OK
11 OK
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 05:25, Set: 20:28, Transit: 12:57. Moon - Rise: 20:51, Set: 04:50. Civil Dark: 21:06 - 04:45. Nautical Dark: 21:59 - 03:52. Astro Dark: 23:07 - 02:43

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
8
14
21
32
38
47
52
54
56
54
78
54
71
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
20
38
47
52
54
56
45
28
6
8
10

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
4
10
13
17
20
23
26
33
36
40
49
54
54
51

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
2
1
0
12
25
35
47
93

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
4
11
19
29
32
41
42
36
26
28
45

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
8
8
8
8
7
7
7
7
7
7
9
10
10
10
10
11
9
9
9
7
6
6
7

Chance of Frost

Temperature (°C)

10
10
9
9
9
9
8
8
8
8
9
11
13
15
16
18
19
19
18
18
18
18
18
16

Feels Like (°C)

9
8
7
8
7
8
7
7
7
7
8
10
11
13
16
17
19
19
18
19
19
19
20
16

Dew Point (°C)

6
5
5
4
4
4
4
5
5
6
6
6
7
8
8
9
10
10
10
10
11
13
13
13

Relative Humidity (%)

72
74
74
72
72
74
77
81
84
85
80
72
68
62
59
57
56
57
57
59
62
69
74
83

Pressure (mb)

1022
1021
1021
1021
1021
1020
1020
1019
1019
1019
1019
1019
1019
1018
1018
1017
1017
1017
1016
1016
1016
1015
1015
1015

Ozone (du)

382
384
385
385
384
381
380
381
380
379
379
380
381
378
376
375
375
376
376
374
372
371
369
369

Friday 1

Full Moon 100%

No Rise

05:05

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 05:23, Set: 20:30, Transit: 12:57. Moon - Rise: No Rise, Set: 05:05. Civil Dark: 21:08 - 04:43. Nautical Dark: 22:01 - 03:49. Astro Dark: 23:11 - 02:38

Total Clouds (% Sky Obscured)

100
100
95
99
97
96
94
83
72
64
66
70
78
80
68
80
80
80
81
78
76
74
82
91

Low Clouds (% Sky Obscured)

9
21
34
46
47
47
53
53
48
46
51
59
67
57
48
39
37
35
32
41
50
59
57
55

Medium Clouds (% Sky Obscured)

46
48
48
77
85
91
91
83
72
64
60
50
50
52
20
27
32
37
39
37
38
38
41
36

High Clouds (% Sky Obscured)

100
96
87
88
80
73
64
54
51
45
40
30
25
8
27
38
27
16
8
3
2
0
21
41

ISS Passover

Visibility (miles)

3
3
3
4
6
4
9
6
5
1
1
4
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
Very Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

52
54
56
48
42
37
34
54
79
95
95
59
13
8
1
0
3
5
4
12
17
23
21
20

Precipitation Amount (mm)

0.3
0.3
0.3
0
0
0
0
0.2
0.4
1.4
1.7
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

8
7
7
7
7
7
6
6
6
7
9
9
8
7
8
9
10
9
9
8
6
7
10
8

Chance of Frost

Temperature (°C)

14
13
12
12
12
12
12
11
11
12
11
12
13
14
16
17
17
18
18
19
17
16
15
14

Feels Like (°C)

12
11
11
11
10
10
11
11
11
11
9
10
11
13
14
15
15
15
16
16
16
16
16
12

Dew Point (°C)

13
12
12
12
11
11
11
11
11
12
11
11
12
13
12
11
10
10
10
10
10
10
11
11

Relative Humidity (%)

93
95
96
96
96
96
98
98
100
100
98
96
96
95
77
67
63
60
58
55
61
69
76
82

Pressure (mb)

1015
1015
1015
1015
1014
1014
1014
1013
1013
1013
1012
1013
1013
1013
1013
1012
1012
1012
1011
1011
1011
1011
1011
1011

Ozone (du)

368
368
371
369
367
366
366
366
367
366
363
368
373
377
381
384
386
385
384
384
386
388
390
389

Saturday 2

Waning Gibbous 98%

22:08

05:25

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 OK
19 Bad
20 Bad

Sun - Rise: 05:21, Set: 20:32, Transit: 12:56. Moon - Rise: 22:08, Set: 05:25. Civil Dark: 21:10 - 04:41. Nautical Dark: 22:04 - 03:47. Astro Dark: 23:15 - 02:34

Total Clouds (% Sky Obscured)

99
98
98
94
85
80
78
69
57
45
54
66
78
68
60
57
58
56
56
42
32
23
35
47

Low Clouds (% Sky Obscured)

53
53
50
46
43
37
34
36
36
38
51
63
72
68
60
57
58
56
56
42
32
21
31
40

Medium Clouds (% Sky Obscured)

37
37
38
39
41
40
42
34
20
8
5
3
1
1
0
0
0
0
0
1
2
3
9
13

High Clouds (% Sky Obscured)

58
42
24
10
7
3
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
3
8

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7
6
7
8
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

10
18
16
13
13
11
4
2
1
0
2
2
1
24
36
47
43
40
39
35
33
32
25
18

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
5
6
7
8
8
9
9
9
9
9
9
10
11
11
10
10
9
9
8
8
7
6
5

Chance of Frost

Temperature (°C)

12
11
11
10
10
9
9
8
8
8
9
10
11
13
13
14
15
15
15
16
15
13
12
11

Feels Like (°C)

12
12
12
12
11
9
8
9
8
8
8
8
8
9
10
10
11
14
14
13
13
13
12
11

Dew Point (°C)

10
10
9
9
9
8
8
8
8
7
7
8
7
8
8
8
9
9
8
8
8
8
8
7

Relative Humidity (%)

86
91
91
91
91
93
95
95
95
93
91
85
77
71
70
69
68
66
62
59
66
71
76
78

Pressure (mb)

1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1013
1013
1013
1012
1012
1012
1012
1012
1013
1013

Ozone (du)

388
387
388
389
390
390
390
389
389
388
388
387
386
385
384
383
381
381
380
380
379
379
379
379

Sunday 3

Waning Gibbous 95%

23:20

05:55

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 05:19, Set: 20:33, Transit: 12:56. Moon - Rise: 23:20, Set: 05:55. Civil Dark: 21:12 - 04:39. Nautical Dark: 22:06 - 03:44. Astro Dark: 23:19 - 02:29

Total Clouds (% Sky Obscured)

60
68
75
81
81
82
83
80
75
73
78
81
83
71
58
42
41
37
36
33
28
32

Low Clouds (% Sky Obscured)

49
60
69
76
77
76
77
72
66
61
66
71
76
69
58
42
32
18
7
6
4
2

Medium Clouds (% Sky Obscured)

17
21
26
32
32
28
27
19
15
3
2
2
1
5
9
12
17
18
16
13
20
20

High Clouds (% Sky Obscured)

16
33
50
66
42
22
1
1
0
0
1
2
2
2
2
1
1
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
6
4
4
5
5
6
7

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

8
15
16
13
15
12
6
15
17
14
20
22
14
39
50
57
59
61
64
58
55
56

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.3
0.3
0.3
0.2
0.2

Wind Speed/Direction (mph)

4
3
2
2
3
3
3
4
3
3
3
2
2
3
3
4
4
6
6
6
6
6

Chance of Frost

Temperature (°C)

9
8
8
7
7
7
6
6
6
7
7
9
10
12
13
14
15
15
15
15
15
14

Feels Like (°C)

12
13
12
11
10
6
6
5
5
5
6
7
8
9
10
10
11
16
15
15
14
15

Dew Point (°C)

7
6
6
5
5
5
4
4
4
5
6
7
7
8
8
8
9
9
8
8
9
9

Relative Humidity (%)

82
85
85
85
87
85
87
86
87
90
91
85
80
75
72
68
66
66
64
64
67
73

Pressure (mb)

1013
1014
1014
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1012
1012
1011
1011
1011

Ozone (du)

379
379
380
381
382
384
386
387
387
387
387
390
392
395
395
396
396
395
395
394
394
394

Forecast for Boston, Lincolnshire, United Kingdom (52.98,-0.02)

Generated: 27/04/26 21:43:03. Forecast: 27/04/26 to 03/05/26. Timezone: UTC+1.00